Talk:Recurrence quantification analysis

Physics C‑class Mid‑importance

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Systems: Chaos theory B‑class Mid‑importance

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R(i,j) is not defined. In general, I believe, it is a measure of how dissimilar the data is at two time points. For example R(i,j) = 1 for ||x_i, x_j||^2 < r, 0 elsewhere.